Are earthquakes on the increase?

NO. There is no evidence
that earthquakes are becoming more frequent, we are simply recording larger
numbers, especially of small earthquakes. The number of larger events
remains stable. As extensive world-wide monitoring networks continue to
expand, more events are located each year. The table below details USGS
data for the frequency of earthquakes since 1900:

FREQUENCY OF OCCURRENCE OF EARTHQUAKES BASED ON OBSERVATIONS SINCE 1900